Abstract: A method, implemented by a computer, for determining a position of a personal mobility device (PMD) comprises: estimating a position of a PMD based on a first wireless signal; determining whether the PMD is within an intermediate area between a first area and a second area, based on an estimated position of the PMD; determining whether the PMD moves to the second area, by using both the first wireless signal and a second wireless signal; and determining position of the PMD by using any one of the first wireless signal and the second wireless signal based on a movement of the PMD to the second area.

Abstract: The present disclosure relates to a method for carrying out dose delivery quality assurance for high-precision radiation treatment, in which parameters affecting a pass rate of dose delivery quality assurance can be derived through regression analysis, which is a known statistical analysis method, and a pass rate prediction model capable of predicting each parameter and the pass rate of dose delivery quality assurance can be derived, and accordingly, it can be predicted in advance whether dose delivery quality assurance will be passed according to the parameters through the above prediction model, without repeatedly carrying out dose delivery quality assurance according to a patient's treatment plan, and as a result, the efficiency of dose delivery quality assurance can be enhanced, and the time or capacity required for such quality assurance is reduced, such that radiation treatment for an actual patient can be quickly and precisely carried out.

Abstract: A complex wireless service apparatus using wired and wireless communication systems and a method thereof includes, when a call of the complex wireless terminal is not reachable, a call forwarding is automatically tried through another network by making a location of a service user to be registered automatically using the complex wireless terminal, and the service user can make a speech without any disconnection using a hand off between networks for the complex wireless terminal when the user moves from one network to another network during making a call. A home location register stores a database of a mobile communication phone number for the complex wireless terminal, whether an extension is located inside or outside, a public phone number, and a wireless terminal unique number.

Abstract: A complex wireless service apparatus using wired and wireless communication systems and a method thereof includes, when a call of the complex wireless terminal is not reachable, a call forwarding is automatically tried through another network by making a location of a service user to be registered automatically using the complex wireless terminal, and the service user can make a speech without any disconnection using a hand off between networks for the complex wireless terminal when the user moves from one network to another network during making a call. A home location register stores a database of a mobile communication phone number for the complex wireless terminal, whether an extension is located inside or outside, a public phone number, and a wireless terminal unique number.